TWI532443B - The use of protective clothing and the use of its protective clothing - Google Patents

Description

Laminated fabric for use in protective clothing and protective clothing using the same

The present invention relates to a laminated fabric for protective clothing having high heat resistance and heat insulation which is excellent in light weight and comfort, and a protective garment using the same.

In the past, fire-resistant protective clothing worn by firefighters during fire-fighting operations may be made of organic fiber cloth such as linaloamine, polyphenylene sulfide, polyimide or polybenzimidazole.

In recent years, a protective garment (Patent Document 1) and the like have been proposed for the purpose of improving the safety or comfort of a firefighter, and the texture of the (a) texture is composed of an intermediate linalamide fiber and a linalylamine fiber. (b) the intermediate layer has moisture permeability and water repellency, and (c) the heat insulating layer is a composite composed of a nonwoven fabric of inter-linaramine fibers and a woven fabric of linalylamine fibers, which has the above (a) - (c) A composite fabric having excellent flame resistance and heat insulation properties. For the purpose of further preventing the radiant heat generated by the fire, the fabric is applied to a fabric composed of such a flame-resistant fiber, or a metal foil is vapor-deposited, and the surface is processed (for example, refer to Patent Document 1). Patent application scope 3~4). However, when a cloth which is subjected to coating processing is used as a protective clothing, the disadvantage that the weight becomes very heavy still exists. Further, from the viewpoint of producing an air layer, it is most useful to form a laminated structure in order to improve the heat insulating property, but the laminated structure has a hard stretch feeling, and it is extremely difficult to suppress the weight of the protective clothing to be greatly increased. .

In addition, a heat-resistant laminated structure using a raised hair (Patent Document 2) or the like has been proposed without increasing the weight and improving the heat insulating property, and further improving the wearing feeling without a hard stretch. In terms of the improvement of the heat insulation, although there is a certain effect, the accumulation of heat generated by the body is also large, so that the comfort is not impaired, and if the degree or weight of the hair is reduced, the heat insulation is directly reduced. presence.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] JP-A-2000-212810

[Patent Document 2] JP-A-2009-263809

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems in the prior art, and to provide a laminated fabric for protective clothing and a protective garment using the same which can provide higher heat insulation and comfort.

In view of the above-mentioned problems, the inventors of the present invention have found that a fabric structure having higher heat insulating properties, lightness, and comfort can be obtained by the following constitution.

That is, the laminated fabric of the protective garment of the present invention is composed of two or more layers of the outer layer and the inner layer, and is used for the protective clothing, and the inner layer is disposed on the laminated fabric of the protective garment on the muscle side. The outer layer is a fabric having a LOI value (critical oxygen index) measured by the JIS L 1091 E method and a fiber composed of 21 or more, and the inner layer is a JIS L 1091 E method having a LOI value (critical oxygen index) of 21 In the above, the thermal diffusivity is a fabric composed of fibers of 2.2 × 10 ^-6 m ² ‧ s ^-1 or more, and the void ratio of the cloth is 85% or more, less than 98%, and the thickness is 0.5 mm or more and 8.0 mm or less. The unit weight is 80 g/m ² or more and 250 g/m ² or less.

According to the present invention, it is possible to provide a protective garment which can be used as a laminated fabric which is also provided by light weight and comfort and high heat insulation, and which is used in a high temperature environment, such as a fire service suit. Under the work clothes, etc.

[Formation for implementing the invention]

Hereinafter, the present invention will be described in detail.

The laminated fabric of the protective garment of the present invention is composed of a layer of two or more layers of the outer layer and the inner layer.

In the present invention, the outer layer must be a cloth having a critical oxygen index (LOI) of 21 or more. The critical oxygen index (LOI) is preferably 24 or more. The critical oxygen index is the oxygen concentration (%) of the environment required for continued combustion. If it is 21 or more, in normal air, the combustion does not continue and the fire is extinguished by itself, and high heat resistance can be exhibited. Here, the critical oxygen index (LOI) is a value measured in accordance with JIS L1091 (E method) as described above.

As described above, by using a fabric having an outer layer having a critical oxygen index (LOI) of 21 or more, high heat resistance can be exhibited. The fibers constituting the above-mentioned cloth may, for example, be a melamine fiber, a styrene fiber, a polybenzimidazole fiber, a polyimine fiber, a polyamidene fiber, a polyether quinone fiber, or a poly Aromatic acid ester fiber, polyparaphenylene benzobisoxazole fiber, Novoloid fiber, Polykural fiber, flame resistant acrylic fiber, flame resistant snail fiber, flame resistant polyester fiber, flame resistant cotton fiber, flame resistant cotton fiber, and the like. In particular, in the present invention, for the purpose of enhancing the strength of the linalylamine fiber, or the woven fabric or the knitted fabric between the polyisophthalamide or the like, the pair of arylamine fibers, that is, the polyparaphenylene pair, is used. The amine is useful for copolymerizing the fiber of the third component or the like. An example of the polyparaphenylene-p-amine copolymer can be exemplified by the copolymerized p-phenylene ‧3,4'-oxydiphenylene p-decylamine shown by the following formula.

【化1】

(here, m and n represent positive integers)

Long fibers or short fibers can also be used in the above fibers. Further, it is also possible to use two or more types of the above fibers in a mixed or blended form.

The above-mentioned fabric may be used in the form of a woven fabric, a knitted fabric, a non-woven fabric, or the like, but is preferably a woven fabric. Moreover, the woven fabric may be any woven fabric such as plain weave, woven weave, and woven woven fabric. Further, two kinds of fibers can be used for the woven fabric and the knitted fabric, and they can be woven and interlaced.

In particular, in the case of the fabric used for the outer layer, in the present invention, the linalylamine fiber and the linalylamine fiber are preferably blended and used as a spun yarn, but the pair of linalylamine The mixing ratio of the fibers is preferably 5% by weight or more based on the total fibers constituting the cloth. However, since the linalylamine fibers are likely to cause fibril, the mixing ratio is preferably suppressed to 60% by weight or less.

Further, it is preferable to use a fabric having an outer layer (surface layer) in a range of 160 to 400 g/m ² . When the unit weight is less than 160 g/m ² , sufficient heat resistance may not be obtained, and when the unit weight exceeds 400 g/m ² , the wearing feeling when the protective clothing is formed is hindered, which is not preferable.

Further, in the present invention, the cloth of the inner layer has a critical oxygen index (LOI) of 21 or more, preferably 24 or more, and a thermal diffusivity of the fiber axis direction of 2.2 × 10 ^-6 m ² ‧ s ^-1 or more, preferably 2.5×10 ^-6 m ² ‧ s ^-1 or more fabrics, and the void ratio of the fabric is 85% or more and less than 98%, preferably 90 to 96%, and the thickness is 0.5 mm or more and 8.0 mm or less. It is 0.9 to 5.0 mm, and the unit weight is 80 g/m ² or more, and 250 g/m ² or less, preferably 94 to 200 g/m ² is important. At the same time, when meeting these requirements, the problem of the invention can be achieved first.

In other words, the present inventors finally conceived that the fabric of the inner layer reduces the amount of heat accumulated in the clothes when exposed to the flame, and has the characteristics of efficiently diffusing the accumulated heat in the direction of the surface of the cloth. If one piece of fabric is used at the same time, it is possible to obtain a protective garment which is excellent in heat insulation and which is lightweight and excellent in comfort. It has been found that the inner layer is made of a fabric which satisfies the above requirements at the same time.

Therefore, the critical oxygen index (LOI) of the cloth constituting the inner layer must be 21 or more, whereby high heat resistance can be exhibited.

Further, the fibers constituting the fabric of the inner layer must have a thermal diffusivity in the fiber axis direction of 2.2 ^-6 m ² ‧ s ^-1 or more, whereby the heat insulating function in the thickness direction of the cloth can be held and applied in the plane direction High thermal diffusion and improved thermal insulation.

Further, the thermal diffusivity in the fiber axis direction is selected from a suitable fiber type, or an appropriate heat diffusion function is imparted to the fiber itself, and the crucible can be easily adjusted.

Moreover, when the fabric constituting the inner layer has a void ratio of less than 85%, or a thickness of less than 0.5 mm, or a unit weight of more than 250 g/m ² , it satisfies any of the requirements immediately, and is transmitted to the muscle side when exposed to a flame. The heat is getting more. Further, when the void ratio is 98% or more, or the thickness is 8.0 mm thick, or the unit weight is less than 80 g/m ² , the requirement of either one is satisfied immediately, and the fiber which is thermally diffused by heat conduction is insufficient to obtain the necessary fiber. Thermal diffusion effect. Therefore, the desired thermal insulation performance or comfort cannot be obtained on either side of the case.

Further, the void ratio of the cloth constituting the inner layer can be easily adjusted by the configuration of the woven fabric and/or the non-woven fabric (using the original cotton, the spinning type, the design, etc.) or the press.

Further, the thickness or the unit weight of the cloth constituting the inner layer can be arbitrarily and easily adjusted in the same manner as described above.

The fabric to be used for the inner layer may be any of a non-woven fabric, a woven fabric, or a fluffy fabric. However, a non-woven fabric structure is preferable in that the bulky structure, that is, the high durability of the void ratio is high.

Moreover, the air permeability of the cloth is preferably 20 cm ³ /m ² ‧ sec or more. At this time, not only the light weight, but also the heat or sweat generated by the body escapes to the outside, the performance is obviously high, so the comfort of the protective clothing is changed. high. The above air permeability is more preferably 30 cm ³ /m ² ‧ sec or more.

Further, the air permeability of the cloth constituting the inner layer can be easily adjusted by the configuration of the woven fabric and/or the non-woven fabric (using the original cotton, the spinning type, the design, etc.) or by press.

The fiber system constituting the cloth used in the inner layer satisfies the above conditions, and the material or its constitution is not limited. In order to improve heat conduction, it is also possible to mix fine particles of high thermal conductivity such as metal or carbon, or surface adherends. The above fiber system may use carbon fiber or metal fiber, but it is suitable for practical use or research performance of arylamine fiber, polybenzimidazole fiber, polyimine fiber, polyamidimide fiber, polyether. Yttrium imide fiber, polyarylate fiber, polyparaphenylene benzobisoxazole fiber, Novoloid fiber, Polykural fiber, flame resistant acrylic fiber, flame resistant snail fiber, flame resistant polyester fiber, flame resistant cotton fiber, flame resistant cotton fiber Wait.

Further, in the case where the fiber constituting the fabric used for the inner layer is the same as the outer layer, it is preferable to use the conjugate for the purpose of enhancing the strength of the linaloamide fiber or the woven fabric or the knitted fabric between the polyisophthalamide or the like. An arylamine fiber, that is, a polyparaphenylene terephthalamide, or a fiber of the third component of the copolymerization (for example, copolymerized p-phenylene ‧3,4'-oxydiphenylene phthalamide fiber) .

In particular, in the present invention, the melamine fiber similar to the above-mentioned outer layer which is most practically used for the protective clothing can be suitably used as a base material, and the fine particles having high thermal conductivity will be kneaded to improve thermal conductivity and flame resistance. Fiber of sex. Further, if the carbon fiber or the metal fiber itself satisfies the above-mentioned requirements of the LOI value or the thermal conductivity, the fine particles may not be kneaded, and may be used as it is. In particular, the fiber constituting the inner layer may be, for example, a carbon fiber content of 50% by weight or more.

The type of the fine particles used in the present invention is not particularly limited, but is preferably a fine particle composed of a material having a thermal conductivity of 70 W/(m‧ k) or more. As described above, if the thermal conductivity is improved, the thermal conductivity of the fiber can be increased by a smaller amount, and the fine particles can be added to suppress the fiber reduction. Such fine particles can be suitably exemplified by carbon powder, carbon nanotubes, diamonds, silver, copper, gold, aluminum, and the like. Here, for example, the thermal conductivity of carbon is 129 W/(m‧k), and the thermal conductivity of silver, copper, and gold is 427 W/(m‧k), 402 W/(m‧k), 315 W/( M‧k) (Chemical Fact Sheet edited by the Chemical Society of Japan, Foundation (Maruzen Co., Ltd.)).

Further, the content of the fibers of the fine particles is determined by the specific gravity of the fine particles, but is usually from 1 to 60% by weight, preferably from about 3 to 35% by weight.

Further, the number average particle diameter of these fine particles is generally 10 μm or less, preferably 1 μm or less.

The laminated fabric of the present invention described above may be disposed between the outer layer and the inner layer, or may be disposed on a cloth composed of fibers having an LOI value of 25 or more as a middle layer of a cloth which is fixed to the moisture-permeable waterproof film. In this way, the comfort of the fabric structure can be directly maintained, and the intrusion of water from the outside can be suppressed, and it is more suitable as a fireproof suit for firefighters who perform fire fighting activities such as water discharge. The unit weight of the cloth to be used is preferably in the range of 50 to 200 g/m ² . When it is less than 50 g/m ² , sufficient heat insulating performance may not be obtained, and when the unit weight exceeds 200 g/m ² , the wearing feeling when the protective clothing is formed is hindered, which is not preferable. The cloth is preferably laminated by a film made of a moisture-permeable and waterproof polytetrafluoroethylene or the like, whereby the moisture permeability and the chemical resistance are improved, the evaporation of the sweat of the wearer can be promoted, and the wearing can be reduced. Thermal stress. The unit weight per unit area of the film laminated to the intermediate layer is preferably in the range of 10 to 50 g/m ² . Further, in the case where the film is laminated on the cloth of the intermediate layer, the unit weight of the cloth for performing the intermediate layer of the processing is preferably in the range of 50 to 200 g/m ² as described above.

Moreover, in the laminated fabric of the present invention, the practicality of the muscle touch, the wearability, the durability, and the like can be considered, and the inner layer can be added to the inner side of the inner layer, that is, to the muscle side. The unit weight of the fabric used for the inner layer is preferably in the range of 20 to 200 g/m ² .

For the inner layer, a woven fabric, a non-woven fabric, a braided fabric, or the like, which is a material such as the above-mentioned type of linalylamine fiber, a para-arylene fiber, a polybenzimidazole fiber, or a polyimine fiber, can be used. .

The laminated fabric of the present invention is, for example, a fabric of an outer layer, a fabric of an inner layer, a fabric which is sandwiched between the intermediate layers as needed, and a fabric which is added to the inner layer of the inner layer as needed, and superimposed thereon. The fabric is sewn by a known method for manufacturing. Further, in the laminated fabric of the present invention, the outer layer and the inner layer are overlapped, and a fixed object is attached to sew the fabric, and the fabric can be separated as needed by removing the fixture.

The protective garment of the present invention uses the laminated fabric described above. The laminated cloth is used as a protective garment, and can be produced by sewing or the like by a known method. At this time, in the same manner as described above, the outer layer and the inner layer of the cloth do not have to be joined to each other, and they can be sewn by overlapping. Further, as described above, the fabric of the inner layer is detached from the outer layer of the fabric using a fixed object or the like.

[Examples]

Hereinafter, the present invention will be described in more detail by way of examples. Further, each physical property in the examples was measured by the following method.

(1) unit weight

The measurement was carried out in accordance with the method of JIS L 1096.

(2) Thickness

The measurement was carried out in accordance with JIS L 1096-90 (fabric) or JIS L 1018-90 (ed.) using a Digimagic thickness tester.

(3) Void ratio of fabric

The weight of the fabric of 30 cm on one side of the warp and weft was measured, and then the thickness of the fabric was measured by the above method, and the weight of the fabric was calculated by dividing the weight of the measured fabric by the volume of the fabric. Then, by dividing the density of the fibers constituting the fiber, the volume fraction of the fiber was calculated, and the void ratio of the cloth was calculated by subtracting this from 1.

(4) Air permeability

The measurement was carried out in accordance with JIS L 1096-A.

(5) Critical oxygen index (LOI)

The measurement was carried out in accordance with the method of JIS L 1091 (E method).

(6) Thermal diffusivity of fibers

The thermal diffusivity (α) of the target fiber length direction (fiber axis direction) was obtained by a light communication method using a thermal diffusivity measuring device (manufactured by ULVAC Co., Ltd., model: Laser PIT). The test piece was measured by using a single fiber bundled, irradiated light, semiconductor laser, temperature sensor E thermocouple (wire diameter 100 μm, silver paste), and under vacuum conditions at 25 ° C. Thermal diffusivity.

Then, the specific heat capacity (C _p ) measured by the method of JIS K 7123, and then the density (ρ) measured by the density gradient tube method (N-heptane/carbon tetrachloride, 25 ° C), thermal conductivity (κ) ) Calculated according to the following formula.

κ=αρC _p

(7) Specific gravity

The measurement was carried out in accordance with JIS K 7112 (method of measuring the density and specific gravity of plastic-non-foamed plastic).

(8) Insulation test (insulation)

According to the method of ISO 9151, the flame is exposed to a predetermined flame, and the time when the temperature rises to 24 ° C (HT124) is measured. The longer this time, the better the protection performance.

(9) Comfort test

The total heat loss (THL) (unit W/m ² ) was determined according to the method of ASTM F1868. The larger the value, the better the comfort of the protective clothing.

(10) The average particle size of the microparticles

When the number average particle diameter of the fine fiber-based cutting the cross section was observed by an electron microscope 25μm ² when observed at a magnification of 10 times the average particle dispersion area per cross-sectional area S (μm ^2), was calculated by the following formula ( Y) as a discrete average equivalent diameter.

Y(nm)=2×√(S/π)

Each material was prepared in the following manner and in the following order.

‧ carbon particles (carbon black)

Carbon powder (carbon black FD-0721 manufactured by Daisei Seiki Co., Ltd.) was used. The number average particle diameter was 0.36 μm.

‧Nanocarbon tube

A carbon nanotube (manufactured by Nanocarbon Technologies, Inc.) having an average diameter of 68 nm, an average length of 8 μm, and a bulk density of 0.004 g/cm ³ was used.

‧Diamond particles

Commercially available cluster diamonds (determined by Raman spectroscopy: diamond 80% by weight, graphite 6% by weight, amorphous carbon about 10% by weight, carbon single bond component 4% by weight) 6g and 10% concentrated nitric acid-concentrated sulfuric acid 550 ml was placed together in a quartz flask and boiled at 300 to 310 ° C for 2 hours. After cooling to room temperature, a large amount of water was repeatedly added thereto, followed by centrifugation, followed by decantation, and purification to a pH exceeding 3, and an unprecipitated gray dispersion was obtained even if a dispersant was not specifically added. Dry this to form refined diamond particles. The number average particle diameter was 0.64 μm.

‧ aluminum particles

The crystal form of the α-type alumina fine particles (AKP-30) manufactured by Sumitomo Chemical Industries Co., Ltd. was used. The number average particle diameter was 0.40 μm.

‧ Silver particles

A solution 1 in which 1000 ml of an aqueous solvent in which the weight ratio of pure water and ethanol was mixed at a ratio of 1 to 1 was dissolved, and then ammonium hydroxide was added to adjust the pH of the solution to 11.3 ± 1. When ammonia water is added, initially, the liquid is cloudy and brown, but if the pH is 11.3, it changes to colorless and transparent.

Then, 1000 ml of an aqueous solvent in which the weight ratio of pure water and ethanol was mixed at a ratio of 1 to 1 was dissolved, and 52.8 g of L-ascorbic acid as a reducing agent and 5.6 g of sodium laurate as a surface treatment agent were dissolved to prepare a solution 2 .

The liquid temperature of the solution 2 described above was stirred at 25 ° C, and the solution 1 was slowly dropped to reduce and precipitate the silver fine particles. Then, the precipitated silver fine particles were collected by centrifugal separation, and washed with an aqueous solvent in which the ratio of pure water to ethanol was mixed at a ratio of 1/1 by weight, and dried to obtain silver fine particles. The number average particle diameter was 0.42 μm.

‧ copper particles

In a solution in which copper formate copper 4 and 140 g of water were dissolved in 1000 cc of water, an aqueous solution (pH adjusting solution) in which sodium hydroxide was dissolved was added to adjust the pH of the solution to 13. This solution was mixed with aqueous hydrazine, and if the mixed solution was heated to 80 ° C (heating time was 3 hours), a precipitated powder was obtained. After allowing to stand for 1 hour and cooling, the liquid was filtered using a glass filter at room temperature, washed with water of pH 7, and then washed with acetone and dried to obtain a copper powder. The number average particle diameter was 0.40 μm.

‧ gold particles

In a pressure cooker (inner diameter: 500 mm × height: 800 mm), 300 g of gold fine wire and 5 liters of a gold chloride aqueous solution (gold: 10 g/L) and 0.5 g of dextrin were placed, and the mixture was placed in a nitrogen atmosphere, and then heated to 180 ° C to maintain 30 minute. Thereafter, the quenching pressure cooker was sprayed with water, and the liquid temperature was maintained at 25 ° C for 30 minutes. Thereafter, it was filtered and washed to obtain the obtained gold fine particles. The number average particle diameter was 0.43 μm.

‧ linalin fibers and linaloamide fibers containing microparticles

The preparation of the polymer solution (doping) used in the tester and the blending with carbon black are carried out in the following manner.

Doping modulation

N-methyl-2-pyrrolidone (hereinafter referred to as NMP) having a moisture content of about 20 ppm and 2051 g of a mixture having a moisture content of about 0.5 ppm in the mixing tank of the internal flowing nitrogen, and 2,4'- of the p-phenylenediamine 5114 g of diaminodiphenyl ether was put in and dissolved. In the diamine solution, at a temperature of 30 ° C and a stirring rotation number of 64 times/min, a fine scale was chlorinated to 10320 g of citric acid and charged. The temperature of the solution was raised to 53 ° C by the heat of reaction, and then heated to 60 ° C for 60 minutes. Stirring was further continued at 85 ° C for 15 minutes and the viscosity increase of the solution was terminated to form a polymerization reaction.

Thereafter, 16.8 kg of a NWP slurry containing 22.5 wt% of calcium hydroxide was added, and stirring was continued for 20 minutes to form a pH 5.4 doping. The filtration was carried out with a mesh membrane of 30 micron to complete a polymer solution having a polymer concentration of 6 wt% (hereinafter). It is called doping) modulation. Thereafter, fine particles (microparticles such as silver, copper or gold) were added to the polymer solution and stirring was continued for another 30 minutes to disperse the fine particles.

The polymer solution obtained by placing the fine particles is discharged from the packing and spinning nozzle after metering pumping, and then drawn by dry jet spinning, and solidified, dried, thermally extended, and subjected to a finishing oil agent. Take the product. Then, if necessary, it is crimped by a crimping machine to perform crimping and cutting, and processed into a raw cotton of 51 mm length. Further, it is processed into a 60-gauge (Mianfan) spinning yarn as needed.

When the carbon black is added to the fiber, the doping of the spinneret for the carbon black blending and spinning in the liquid feeding solution is performed, and the carbon black NMP slurry is quantitatively pressed at a pressure of 10 to 20 kg/cm ² , and is immediately implemented. Dynamic mixing, and then, after giving a sufficient mixing effect to the static mixer for more than 20 stages, after being metered and pumped, it is discharged from the bale ‧ spinning nozzle, and then taken out by dry jet spinning, after solidification, drying, heat extension, The finished oil is given and the product is taken up. Then, if necessary, the coiler is pushed in and subjected to crimping and cutting, and processed into a raw cotton of 51 mm length. Further, it is processed into a 60-gauge (Mianfan) spinning yarn as needed.

Further, in the case of the linaloamine fiber which does not contain fine particles, the above-mentioned fine particles are not added, and the same is carried out in the same manner as the melamine fiber containing the fine particles.

‧ Non-woven (non-woven 1~29: inner fabric)

After cutting using various raw cotton obtained by the above-mentioned method of 51 mm length, and superimposing and forming the weight of each required unit, it is not woven by the needle rolling method. Thickness adjustment is carried out by using a heated metal roll or a resin roll as needed to form a non-woven fabric by rolling.

Further, the non-woven fabric 12 is made of the original cotton and the non-woven fabric in the same manner as the melamine fiber obtained by adding the fine particles, except that the fine particles are not added.

‧ fabric 1 (inner fabric)

The use of poly(phenylene isophthalamide) fiber (monofilament denier 2.2 dtex, cut length 51 mm, manufactured by Teijin Techno Products, trade name: Conex) and copolymerized p-phenyl-3,4'-oxydiphenylene 60-gauge double-filament composed of heat-resistant fibers which are mixed with a polyamide fiber (monofilament fineness 1.5 dtex, cut length 51 mm, manufactured by Teijin Techno Products, trade name: Technora) at a mixing weight ratio of 90:10. A silk fabric having a basis weight of 170 g/m ² was produced by using a Repier fiber. Using a raising machine, the raising was carried out by rubbing with a mesh #280 sandpaper installed thereon for 30 seconds. Further, in the nonwoven fabric 1, the addition of carbon microparticles is only on the Technora side.

‧ fabric 2 (inner fabric)

Using a PAN-based carbon fiber (manufactured by Toho Tenax, a fiber diameter of 7 μm, a number of filaments of 1,000, and a thermal conductivity of 10 W/m‧K), a fabric of a unit weight of 170 g/m ² of a plain weave was produced using a Repier loom. Using a raising machine, the raising was carried out by rubbing with a mesh #280 sandpaper installed thereon for 30 seconds.

‧ Fabric A, Fabric B (outer fabric)

The use of poly(phenylene isophthalamide) fiber (monofilament denier 2.2 dtex, cut length 51 mm, manufactured by Teijin Techno Products, trade name: Conex) and copolymerized p-phenyl-3,4'-oxydiphenylene For the melamine fiber (monofilament fineness 1.5 dtex, cut length 51 mm, manufactured by Teijin Techno Products, trade name: Technora), the 40-number double filament composed of heat-resistant fibers mixed at a mixing weight ratio of 90:10 The yarn is woven, and the fabric of the woven Ripstop is woven by a known method, and the scouring treatment is performed to remove the paste and the oil agent on the surface of the cloth. Use this cloth as the outer layer. Fabric A is a fabric having a basis weight of 390 g/m ² , and fabric B is a fabric having a basis weight of 260 g/m ² .

‧ Fabric C (intermediate layer)

A woven phenylisodecylamine fiber (trade name: "Conex", monofilament fineness 2.2 dtex, fiber length 51 mm) and copolymerized paraphenyl-3,4'- Oxydiamine phenyl-p-amide fiber (manufactured by Teijin Techno Products, trade name: "Technora", monofilament fineness 1.7 dtex, fiber length 51 mm) is composed of heat-resistant fibers mixed at a mixing weight ratio of 90:10. Woven cloth of 40 gauge spinning (unit weight: 75 g/m ² , LOI value of 25) laminated moisture-permeable waterproof film made of polytetrafluoroethylene (manufactured by Japan Gortex, unit weight: 35 g/m ² ).

‧ fabric D (inner layer)

Made of copolymerized p-phenylene-3,4'-oxydiphenylene p-phthalamide fiber (manufactured by Teijin Techno Products, trade name: "Technora", monofilament fineness 0.83dtex, total weaving degree 830 Decitex A flat fabric made of silk having a basis weight of 80 g/m ² .

The fabrics of the outer layer, the intermediate layer, the inner layer, and the inner layer (additional inner layer) are superimposed to obtain a laminated fabric.

Examples 1 to 24 and Comparative Examples 1 to 10

The evaluation results of the laminated fabric obtained as described above were combined with Examples 1 to 24 and Comparative Examples 1 to 10 and shown in Table 1.

[Industry use possibility]

The laminated fabric of the present invention is also lightweight and comfortable, and has high heat insulation properties. By using the laminated fabric, it can be used as a protective garment for work clothes in a high temperature environment, including firefighting clothes. use.

Claims (10)

A laminated fabric of a protective garment comprising a fabric of two or more layers of an outer layer and an inner layer, and a laminated fabric having an inner layer disposed on a muscle side of the protective garment when used in a protective garment, wherein the outer layer is The LOI value (critical oxygen index) measured by the JIS L 1091 E method is a cloth composed of fibers of 21 or more, and the inner layer has a LOI value (critical oxygen index) of JIS L 1091 E method of 21 or more, and a thermal diffusivity. The fabric is composed of fibers of 2.2×10 ^-6 m ² ‧ s ^-1 or more, and the void ratio of the inner layer fabric is 85% or more, less than 98%, and the thickness is 0.9 mm or more and 8.0 mm or less, and the unit weight is 80 g/m ² or more and 250 g/m ² or less. The laminated fabric of the protective garment of claim 1, wherein the fabric of the inner layer has a degree of air permeability of 20 cm ³ /m ² ‧sec or more. The laminated fabric of the protective garment of claim 1, wherein the fiber constituting the inner layer is composed of a fiber-forming polymer and contains a material having a thermal conductivity of 70 W/(m ‧ k) or more The particles formed. The laminated fabric of the protective garment of claim 3, wherein the fiber constituting the inner layer is composed of a fiber-forming polymer and contains carbon powder, carbon nanotubes, diamonds, silver, copper, At least one of gold and aluminum particles. For example, the laminated fabric of the protective garment of claim 1 is in which the fabric of the inner layer is non-woven. A laminated fabric of the protective garment of claim 1, wherein the fabric of the inner layer is raised. The laminated fabric of the protective garment of claim 1, wherein the fabric of the inner layer contains 50% by weight or more of carbon fibers. The laminated fabric of the protective garment of claim 1, wherein the intermediate layer has an intermediate layer between the outer layer and the inner layer, and the intermediate layer has a LOI value (critical oxygen index) of 25 or more by JIS L 1091 E method. The cloth composed of the fibers is laminated to the fabric of the moisture-permeable waterproof film. The laminated fabric of the protective garment of claim 1, wherein when used in a protective garment, the inner layer is disposed on the more muscular side of the inner layer. A protective garment which is a laminated fabric using the protective garment of any one of claims 1 to 9.